This article describes the Microsoft DoubleSpace Conversion
Kit (DBLCONV.EXE) and how to obtain and install it. The DoubleSpace Conversion
Kit enables you to convert DoubleSpace-compressed drives to DriveSpace format.
DBLCONV.EXE is a self-extracting executable file that contains the following
NOTE: If you installed MS-DOS 6.22 Step-Up, you should already
have the DRVSPACE.MR1 file in your DOS directory and therefore do not need to
obtain this conversion kit.
The DoubleSpace Conversion Kit provides the DRVSPACE.MR1 file. If
you used MS-DOS 6 or 6.2 before installing MS-DOS 6.22, the DRVSPACE.MR1 file
enables MS-DOS to read data stored in the DoubleSpace compression format even
if the DoubleSpace driver (DBLSPACE.BIN) is not loaded in memory.
DRVSPACE.MR1 makes it possible to:
• Convert DoubleSpace-compressed drives to DriveSpace format.
• Use DriveSpace to mount and read DoubleSpace-compressed
• Use MS-DOS 6.22 ScanDisk to check and repair
DoubleSpace-compressed drives and compressed volume files (CVFs), even if
DBLSPACE.BIN is not loaded in memory.
• Use MS-DOS 6.22 Backup for MS-DOS to restore backups
created with MS-DOS 6 or 6.2 Backup for MS-DOS or Windows, even if DBLSPACE.BIN
is not loaded in memory.
IMPORTANT: DRVSPACE.MR1 works in conjunction with the MS-DOS
DBLSPACE.BIN file. If you did not install MS-DOS 6.22 over MS-DOS 6.0 or 6.2,
you do not have the DBLSPACE.BIN file.
If you did not install MS-DOS
6.22 over MS-DOS 6.0 or 6.2, you can obtain the DBLSPACE.BIN file from online
services. For information about obtain- ing the DBLSPACE.BIN file, please see
the following article in the Microsoft Knowledge Base:
Cannot Restore DoubleSpace-Compressed Backup with MS-DOS
For information about converting DoubleSpace-compressed drives to
DriveSpace format, type "help dblspace" (without the quotation marks) at the
MS-DOS command prompt after you upgrade to MS-DOS 6.22, and then choose the
Availability of the Dblconv.exe File
file is available for download from the Microsoft Download
additional information about how to download Microsoft Support files, click the
following article number to view the article in the Microsoft Knowledge Base:
119591 How to Obtain Microsoft Support Files from Online Services
Microsoft scanned this file for viruses. Microsoft used the most
current virus-detection software that was available on the date that the file
was posted. The file is stored on security-enhanced servers that help to
prevent any unauthorized changes to the file.
You can also:
• Fill out and return the form included in your MS-DOS 6.22
• Call the Microsoft Sales Information Center (MSIC) at (800)
426-9400 and order the Microsoft DoubleSpace Conversion Kit.
To install the DoubleSpace Conversion Kit, follow these steps:
• Copy the DBLCONV.EXE file to a blank floppy disk.
• Change to the floppy disk drive by typing
A: or B: at the MS-DOS command
• Run DBLCONV.EXE by typing dblconv at
the MS-DOS command prompt.
DBLCONV.EXE extracts the compressed files
and stores them in the root directory of the floppy disk.
• Run SETUP.EXE by typing setup at the
MS-DOS command prompt.
Setup installs the DoubleSpace Conversion Kit
on your hard disk.
NOTE: The Setup program must be run from a floppy